Leather-skiving machine.



l Patented Aug. I9, |902. J.. W. POOLE. l LEATHER SKIVING MACHINE.

No. 707,35I.

(Application filed Dec. 4, 1901.)

3 Sheeis--Sheet l.

(No Model.)

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No. 707,351. Patented Aug. I9l i902.

J. w.PooLE.

LEAYTHER SKIVING MAGHIIIE.

(Application led Dec. 4, 1901.) (no Model.) 3 sheets-sheet 2.

J. W. POOLE.

LEATHER SKIVING MACHINE.

(Application led Dec. 4, 1901.)

No.1707,35|. Patented Aug. le, |902.

(No Modeln 3 Sheets-Sheet 3.

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NITED Sii/iras` iATnNT OFFICE.

JOI-IN W. POOLE, OF LYNN, MASSACHUSETTS, ASSIGNOR TO THE POOLE SKIV- ING COMPANY, OF KITTERY, MAINE, A CORPORATION OF MAINE.

LEATHER- SKIVING MACHINE.

SPECIFICATION forming part of Letters'ratent No. 707,351, dated August 19, 1902.

Application filed December 4, 1901. Serial No. 84,689. (No model.)

To @Z whom it may con/Oerle:

Be it known that I, JOHN W; POOLE, a citizen of the United States, residing at Lynn, in the county of Essex and State of Massachusetts, have invented certain new and'useful Improvements in Leather-Skiving Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the Io art to which it appertains to make and use the same.

The present invention relates to leatherskiving machines for producing articles of leather-such as counters,boxtoe pieces, and

I5 the like-and more particularly to leatherskiving machines which comprise a die-roller provided with a die-cavity of the shape ofthe article to be produced and a pressure device for holding the blank in the die-cavity'during 2o the action thereon of the skiving-knife. In this class of machines the pressure device usually consists of a series of spring-actuated levers, the ends of which extend into grooves in the feed-roller, which coperates with the die-roller in forcing the blank against thev skiving-knife and press upon the blank at the line of contact therewith of the die and feed rollers. The ends of these levers which are acted upon by the springs-bear against a stopbar which limits the movement of the levers under the force of the springs. The pressurelevers are necessarily thin, and although the ends of the levers which engage the blank are hardened these ends rapidly wear away, so

3 5 that an adjustment of the stop-bar is required to enable the levers to move a sufficient distance under the force of the springs to'press the blank into the die-cavity. This adjustment of the stop-bar diminishes the tensionA 4o of the springs, and in order to restore the springs to their original tension means have been provided in machines as heretofore constructed for adjusting l the tension of the springs either collectively or individually.

One of the objects of my invention is to provide a machine for skiving articles of leather provided with spring-actuated pressure-levers, in which an adjustment of the stop-bar for limiting the movement of the levers under 5o the force of the springs does not alter the tension of the springs, so that no adjustment of the tension of the springs is required to compensate for the wearing away of the ends of the levers.

To this end a feature of my invention contemplates providing means for simultaneously adjusting the stop-bar and the bar to which the springs which act upon the pressure-levers are secured.

A further object of my invention is to p'ro- 6o 'vide a leather-skiving machine for producing articles of leather, invwhich less resistance is offered to the blank by the skiving-knife than when astationary knife is employed, wherebythe machine is rendered easier of operation and the skiving-knife is caused to produce a smooth clean cut regardless of inequalities in the density of the stock being operated upon.

To this end a feature o'f my invention relates to certain means for movably mounting the skiving-knife and for vibrating the skiving-knife during the skiving operation.

In order to increase the speed of operation and to render the machines more completely automatic in'their action, leather-skiving machinos comprising a die-roller and a pressure device have been provided with a hopper for holding the'blanks and withfeeding mechanism for feeding the blanks to the die-roller and pressure device.

A further object of my invention is to provide such a machine with an improved form of hopper, and to this end certain features of my invention consist in providing a leatherskiving machine with the improved form of hopper hereinafter described and claimed.

A preferred form of my invention is illustrated -in the accompanying drawings, in which- Figure l is a view in side elevation of a counter skivingmachine embodying the same. Fig. 2 is an end view of the machine looking from the left of Fig. l. Fig. 3 is a plan View, the feed-slide and feed-table lbe- 95 ing partially broken away to show underlying parts. Fig. 4 is a partial end view of the machine, looking frorn the right of Fig. l, illustrating the construction by means of which the stop-bar and the bar to which the springs Ico are secured are simultaneously adj usted. Fig. 5 is a detail sectional view on the line 5 5 of Fig. 1. Fig. (j is a detail sectional view illustrating the'construction by means of which the tension of the springs is adjusted,

and Fig. 7 is a partial plan View of the bars to which the springs are secured.

1 indicates the die-roller, 2 the feed-roller, 3 the skiving-knife, and 4 the pressure-levers, the relative arrangement of these parts being the same as that commonly used in this class of machines. The die-roller 1 is splined on the die-roller shaft 5, journaled in bearings in the machine-frame. The outer end of the shaft 5 is supported in a bearingblock 6, removably secured to an overhanging portion 7 of the machine-frame by means of a bolt 8 to allow the die-roller to be removed frein the machine. As is common in this class of machines, the feed-roller 2 is mounted upon a shaft 9, which is journaled in a vertically-movable block 10, which is pressed upwardly toward the dieroller by means of a spring 11, the upward movement of the block being limited by adjustable stopnuts l2, secured upon the lower ends of the rods 13, projecting downwardly from the block 10 through lugs 14 on the machineframe. The springs which act upon the pressure-levers 4 are indicated at 15. The upper ends of these springs screw into blocks 16, to which are pivoted links 17. A spring is provided for each pressure-lever, and a pin 18 on each link projects laterally over the end of one of the levers. The lower ends of the springs 15 screw into blocks 19, which are supported by a bar 20. The movement of the levers 4 under t-he force of the springs 15 is limited by a stop-bar 2l.

Means are provided for adjusting the stopbar 21 to allow the pressure-levers to move a sufficient distance under the force of the springs to force the blank into the die-cavity in the die-roller 1 after the ends of the lever have been worn away during the operation of the machine, and in order to prevent diminishing the tension of the springs during such adjustment of the stop-bar means are provided forsimultaneousiy adjusting the bar 20, to which the blocks 19 are secured. The construction shown in the drawings forsimultaneously adjusting the stop-bar 21 and the bar 2O consists of asupport 22, which is mounted to slide on a vertical guideway 23 on the machine-frame. The support 22 is moved on the guideway 23 by means of an adjustingscrew 24, provided with right and left threads, one thread engaging a screw-thread in the machine-frame and the other thread engaging a screw-thread in the support 22. The support is locked in adj usted position by means of headed bolts 25, passing through slots in the support and screwing into the guideways 23. The stop-bar is supported upon the upper surface of the support 22, and the bar 2O is rigidly secured to the lower ends of the rods 26, projecting downwardly from the support. By this construction it will be seen that any adjustment of the stop-bar to compensate for the wearing away of the ends of the levers produces a corresponding adjustment of the bar 2O and that no change in the adjustment of the springs is required to compensate for the wearing away of the ends of the levers. It is, however, desirable to adjust the tension of the springs to adapt the machine for operation upon different kinds of stock, and in order to accomplish this result the machine shown in the drawings is provided with means for adjusting the tension of the springs separately. These means consist of the blocks 19, which are rotatably mounted in semicircularopenings in the sides of the bar 2O (see more particularly Figs. 6 and 7) and are held in position by means of clamping-bars 27, provided with semicircular openings registering with the openings in the sides of the bar 20, secured to the bar 2O by means of clamping-screws 28.

The skiving-knife 3 is secured to a knifecarrier 29, so as to be adjustable toward and from the die and feed rollers by means of screws 30, passing through slots in the knife. The knife-carrier 29 is mounted in a dove- `tailed guideway cut in the upper surface of a support 3l, so as to be movable transversely to the direction of feed. In order to allow the skiving-knife to be adjusted perpendicularly to the plane of feed to bring the cutting edge of the knife into proper position with relation to the surface of the die-roller, the support 31 is mounted in a vertical guideway of the machine-frame, and a screw-threaded rod 32, having right and left threads engaging corresponding threads in the machineframe and in the support, is provided, by means of which the support may be adjusted on its guideway. The support 31 is locked rigidlyin adjusted position by means of bolts 33, passing through slots in the support and screwing into the frame of the machine. The knife-carrier 29 is vibrated in its guideway during the skiving operation by means of a IOO IIO

bent lever 34, one arm of which is connected by means of a link 35 to the carrier and the other arm of which is pivotally connected to a link 36, which is actuated by means of a crank-pin or eccentric on a shaft 37. The link connection between the lever 34 and the knife-carrier allows the block 3l to be adjusted on its vertical guideway without disturbing the connections through which the knife-carrier is Vibrated from the shaft 37. The shaft 37 is arranged at right angles to the die-roller shaft 5 and is geared thereto by means of the beveled gears 38 and 39, secured to the shaft 37 and the die-roller shaft, respectively. The die-roller shaft is rotated from the feed-roller shaft by means of a gear 40, secured to the die-roller shaft and meshing with a gear 4l, secured to the feed-roller shaft. Also secured to the feed-roller shaft is a gear 42, which meshes with a gear 43, secured to the main driving-shaft, which is driven by means of a belt passing over the pulley 44, secured to the shaft. During the operation of the machine the knife-carrier and the skivingknife secured thereto are vibrated transversely to the direction of feed, so that the cut produced by the knife is a draw-cut instead of a straight drag-cut, as in this class of machines as heretofore usually constructed. The resistance offered to the blank by the knife is thus materially decreased and a smooth clean cut is produced. By mounting the knife-carrier in guideways on its support the carrier is held from displacement by the contact of the blank with the skiving-knife, and the cutting edge of the knife is maintained as rigidly in position with relation to the surface ofthe die-roller as Awhen the knife is rigidly secured to a fixed portion of the machine-frame. i

The feed-table is indicated at 45.v A block 46 is mounted to slide on a guideway on the edge of the feed-table and is connected by means of a rod 47 to a crank 4S, pinned to the end of the feed-roller shaft 9. To the block 46 is secured a feed-plate 49, which extends over the upper surface of the table 4 5 and is provided with a notch in its leading edge to tit the rear portion of a blank. The upper surface of the block 46 is provided with a series of notches, and the edge of the plate 49, which is secured to the block 46, is slotted to form two projections or tongues, which are received in the notches in the block 46 and are clamped to the block by means of a clam ping-plate 50, provided with notches registering with the notches in the block. As shown in the drawings, the block 46 is provided with four notches, and two tongues are formed at the edge ofV the plate 49, whereby the plate can be secured to the block in any one of three different positions. The hopper forsupporting a pile of blanks above the feed-table 45 consists of a side wall 51, a rear wall 52, and a front wall 53. The side wall is secured in position by means of bolts 54, passing through a flange 55, projecting from the wall 51 and screwing into a portion of the frame. The rear wall 52 is pivotally mounted in a block 56, adjustably secured to the upper edge of the side wall by means of a clamp 57 and clamping-screws 58. The pivot of the wall 52 extends above the block 56 and is engaged by a locking-nut 59. The wall 52 can thus be swung upon its pivot toward and from the side Wall to fit the rear portion of the blanks in the hopper and can be locked in position by means of the locking-nut 59. The front wall 53 is pivotally mounted, so as to swing toward and from the side wall and is adjustable bodily toward and from the side wall and is also adjustable vertically toward and from the feed-table. As shown in the drawings, the front wall is pivotally mounted upon a carrier 60, which is mounted in vertical guideways upon a slide 61, which is mounted in a horizontal guideway in a plate 62, secured tothe overhanging portion 7 of the machine-frame. An arc-shaped slotted arm projects from the front wall over the upper horizontally-extending portion of the slide 60, and through the slot in the arma locking-screw 63 passes, by means of which the front wall is locked in position after having been swung upon its pivot into a position to accom modate the shape of the blan k being operated upon. For adjusting the front wall vertically toward and from the feedtable an adjusting-screw 64 is provided, journaled in .the horizontally-extending upper portion of the slide and screwing into a horizontallyprojecting lug of the slide 6l. An adjustingscrew 65 serves to actuate the silde 61 to adjust the front wall bodily toward and from the side wall. By means of the several adj ustrnen ts above described the front wall can` be set in position to enable the hopper to receive the blanks to be operated upon and to allow but a single blank to be fed from the bottom of the pile of `blanks in the hopper at each reciprocation of the feed-slide.

66 designates a series of stripper-fingers pivotally mounted upon the bearing-block ll() and extending into the grooves in the feedroller below the skiving-knife.

The operation of the machine above described will be readily understood from the preceding description and a separate description thereof is deemed unnecessary.

Having thus described my invention, I claim as new and desire to secure by Letters Patent of the United States- 1. A machine for skiving articles of leather, having, in combination, a die-roller, a series of pressure-levers, springs acting upon the levers, a stop-bar for limiting the movement of the levers under the force of the springs, a bar to which the springs are secured, and means for simultaneously adjusting said bars, substantially as described.

2. Amachine for skiving articles of leather, having, in'combination, a die-roller, a series of pressure-levers, springs acting upon the levers, an adjustable stop-bar for limiting the movement of the levers under the force of the springs, and a bar to which the springs are secured movable with the stop-bar, substantially as described.

3. A machine for skiving articles of leather, having, in combination, a die-roller, a series of pressure-levers, springs acting upon the levers, a stop-bar for limiting the movement of the levers under the force of the springs, a bar to which the springs are secured, and an adjustable support common to both bars, substantially as described.

4. A machine for skiving articles of leather, having, in combination, a die-roller, a series of pressure-levers, a spring acting upon each lever, an adjustable stop-bar for limiting the movement of the levers under the force of the springs, a bar to which the ,springs are secured movable with the stop-bar, and means for adjusting the tension of the springs separately, substantially as described.

IOO

IOS

IIO

IIS

5. A machine for skiving articles of leather,

having, in combination, a die-roller, a pressure device, a support adjustable perpendicularly to the plane of feed, a knife carrier mounted in guideways on said support to move transversely to the direction of feed, a skiving-knife secured to said carrier, a lever, a link connecting the lever and carrier, and means for oscillating the lever, substantially as described.

G. A machine forskiving articles of leather, having, in combination, a die-roller, a pressure device, a skiving-knife adjustable perpendicularly to the plane of feed, and means for vibrating the knife transversely to the direction of feed, substantially as described.

7. A machine for skiving articles of leather, having, in combination, a die-roller, a dieroller shaft, a pressure device, a knife-carrier mounted to move transversely to the direction of feed, a skiVing-knife secured thereto, a lever, a link connecting the lever and knifecarrier, a shaft and intermediate connections for oscillating the lever and gearing connecting said shaft and the die-roller shaft, substantially as described.

8. A leather-skiving machine, having, in combination, a die-roller, a pressure device, a feed-table, mechanism for feeding blanks to the die-rol1er and pressure device, and a hopper comprising a side wall and a front Wall, said front wall being pivotally mounted to swing toward and from the side wall, substantially as described.

9. A leather-skiving machine, having, in combination, a die-roller, a pressure device,

a feed-table, mechanism for feeding blanks to the die-roller and pressure device, a hopper comprising a side wall and a front wall, said front wall being pivotally mounted to swing toward and from the side wall, and means for adjusting the front wall toward and from the feed-table, substantially as described.

l0. A leather-skiving machine, having, in combination, a die-roller, a pressure device, a feed-table, mechanism for feeding blanks to the die-roller and pressure device, a hopper comprising a side wall and a front wall, said front Wall being pivotally mounted to swing toward and from the side wall, and means for adjusting the front wall bodily toward and from theside wall, substantially as described.

ll. A leather-skiving machine, having, in combination, a die-roller, a pressure device. a feed-table, mechanism for feeding blanks to the die-roller and pressure device, a hopper comprising a side wall and a front wall, said front wall being pivotally mounted to swing toward and from the side wall, means for adjusting the front wall toward and from the feed-table, and means for adjusting the front Wall toward and from the side wall, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

JOHN XV. POOLE.

Witnesses:

ISAIAH F. SPINDELL, ALFRED H. HILDRn'ri-i. 

